2010
DOI: 10.1016/j.foodcont.2010.04.021
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Influence of Listeria innocua on the growth of Listeria monocytogenes

Abstract: a b s t r a c tThe growth of Listeria monocytogenes and Listeria innocua strains was monitored during this study: (i) in TSB-YE media and (ii) in a food matrix (pasteurized milk) according to the ISO 11290-1 methodology. Different inocula concentrations and mixtures were tested. The response was shown to be strain dependent. In TSB-YE the inhibition of a L. monocytogenes strain was observed in just one of the three mixtures (L. monocytogenes_1340 with L. innocua_11288) showing a reduction of 1.37 log cfu/ml af… Show more

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Cited by 35 publications
(31 citation statements)
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References 28 publications
(41 reference statements)
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“…No obvious correlations were observed between growth rate and final enrichment populations of each Listeria species or between the ability to produce inhibitory substances and the populations of each Listeria species during the enrichment period. A similar situation also was reported for artificially contaminated milk (6). The presence of L. innocua in test samples can hinder both the detection and recovery of L. monocytogenes.…”
supporting
confidence: 76%
“…No obvious correlations were observed between growth rate and final enrichment populations of each Listeria species or between the ability to produce inhibitory substances and the populations of each Listeria species during the enrichment period. A similar situation also was reported for artificially contaminated milk (6). The presence of L. innocua in test samples can hinder both the detection and recovery of L. monocytogenes.…”
supporting
confidence: 76%
“…It is possible to have falsenegative results for the presence of L. monocytogenes when L. innocua is present. However, bacterial strains may behave differently, particularly when the concentrations of these two species in the sample differ (12). No further experiments were performed on strains isolated from collected flies to determine the possibility of inhibition among Listeria species and/or strains.…”
Section: Discussionmentioning
confidence: 99%
“…Commonly used selective enrichment formulations do not display absolute species level specificity resulting in competition between L. monocytogenes and non-target background microorganisms (Dailey et al, 2014;Dallas et al, 1991;Tran et al, 1990) and between L. monocytogenes and the non-pathogenic species, Listeria innocua (Besse et al, 2005;Carvalheira et al, 2010;Curiale and Lewus, 1994;Keys et al, 2013;Petran and Swanson, 1993). Competition results in limited growth and ultimately a reduced final population of L. monocytogenes which lowers the overall sensitivity of subsequent detection platforms and hinders recovery.…”
Section: Introductionmentioning
confidence: 99%